This switch was purchased when I needed to use a USB keyboard, mouse and microphone/audio device between my PC and workstation. The keyboard and mouse worked perfectly, but the microphone and audio device combination completely lost power at random times, even after using a separate 5V micro-USB power input. This happens on each selected computer. I returned this product and ordered the UGREEN USB 3.0 Sharing Switch Selector 4 Port 2 Computer Adapter Hub instead. Since then there have been no problems.